John faessler



diritti Ctatra aiwi dtiijtt.

Letters Patent No. 101,114, dated March 22, 1870.A

IMPROVEMENT IN WRENCH The Schedule referred to inthese Letters Patent and making part of the same.

I,J0HN FAEssLnn, of Bloomington, in the county of McLean and State of Illinois, have invented certain Improvements in Screw-IVre'nches, of which the followingis a specification.

Nature mul Objects of the Intention.

During a practice of twenty years as a machinist and erecter, I often felt the want of a ,tool or wrench, with which to takea hold of, or turn any piece of machinery, be it square or round, a nut, pipe, stud, &c., with equal facility. In accordance I have for some time been attempting to construct such a tool, and herewith present the result of my study and laborthe old common screw-wrench improved, sothat it will. take a rm hold ot any round piece, just as well as it will hold a square or six-sided nut, 81o., without changing its parts, or without adding any to or taking any from it; and I wish it especially understood Jthat a screw-wrench constructed in this manner will hold any round piece, as Well as a square one of the same size, without any additional strain to the wrench, so that it is equally well adapted to any kind of work; and as for simplicity and consequent cheapness, I dontbelieve it can be excelled.k

Two or three of my improved screw-wrenches, of diierent size, will supply the mechanic, stationary engineer, &c., with wrenches for all his wants, and so replace all that lot of wrenches, pipe-tongues, wrenchjaws, &c., which altogether canse considerable expense and trouble in carrying about.

Description ofthe Accompanying Drawings. l

l Figure 1 is a perspective view of my improved screw-wrench.

Figur-e2 are vertical transverse sections, 'showing the interior of the movable jaw and the saddle, as well as the spring and its position.

General Description.. A is the old and well-known wrench-stem, with upper jaw, thread, nut, and handle.

B is the lower jaw, constructed in such a manner that it is movable, not only up and down, but also lsidewise, its lower ends c being rounded and left a little thicker than the upper portion, in order to strengthen them, resting in a saddle, D, which is connected in the well-known way toA the nut, which, when turned, opens ,or closes the two jaws.

The opening ein the upper end of the lower jaw,

through which the stem passcsfis left a little longer than the width of the stem, from one-eighth to onequarter of an inch, according to size, so as to allow it to move, while the spring F, a piece of an old cloekspring, is riveted on the inside g to press slightly against thestem, to hold the jaw square. l

'lhe faces H of both jaws must be roughed, either` small teeth milled or filed, or cut like a le and hardened to pi event slipping.

Now then, the lower j lower ends, and, by a slight pressure against, to overcome the pressure of the spring, the upper' end moving toward the stem, you will observe that it shortens the distance between the two jaws` A square or cornered piece will evidently hold in this wrench the same as in any other screw-wrench. Should you, though, not have the jaws close-enough, so that another wrench would slip over the corners, this wrench will, in consequence'of the faces being roughed, not

only not slip, but the lower jaw will move, and, shortening the distance between the two jaws, will hold the-piece tight. And so it will hold any round piece; it will not slip, but hold, and the harder you pull, the tighter it will hold, and when you let go, it will let go too.

IVhat I claim, and desire to secure by Letters Patent is '.Ihe wrench composed of the shank, nut, and jaw A, the movable jaw B and spring H, in combination with the saddle D, substantially as described. l

J OHNFAESSLER.

Witnesses HENRY OTTO, DAVID HUGHES.

aw being stationary at its 

